300 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 5.93V (1.43%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 6.11V (1.47%)
Voltage at Load409.1 VLine Loss: 3081.6 W
Max Power & Breaker215.64 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 80m
| Cross-Section (mm²) | Cu Ampacity | Al Ampacity | Cu Voltage Drop | Load Voltage | Al Voltage Drop | Power Loss | Status |
|---|---|---|---|---|---|---|---|
| 1.5 mm² | 16 A | 12 A | 593.05 V (142.9%) | 0.0 V | 978.26 V (235.73%) | 308160.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 355.83 V (85.74%) | 59.2 V | 586.96 V (141.44%) | 184896.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 222.4 V (53.59%) | 192.6 V | 366.85 V (88.4%) | 115560.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 148.26 V (35.73%) | 266.7 V | 244.57 V (58.93%) | 77040.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 88.96 V (21.44%) | 326.0 V | 146.74 V (35.36%) | 46224.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 55.6 V (13.4%) | 359.4 V | 91.71 V (22.1%) | 28890.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 35.58 V (8.57%) | 379.4 V | 58.7 V (14.14%) | 18489.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 25.42 V (6.12%) | 389.6 V | 41.93 V (10.1%) | 13206.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 17.79 V (4.29%) | 397.2 V | 29.35 V (7.07%) | 9244.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 12.71 V (3.06%) | 402.3 V | 20.96 V (5.05%) | 6603.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 9.36 V (2.26%) | 405.6 V | 15.45 V (3.72%) | 4865.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 7.41 V (1.79%) | 407.6 V | 12.23 V (2.95%) | 3852.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.93 V (1.43%) | 409.1 V | 9.78 V (2.36%) | 3081.6 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 4.81 V (1.16%) | 410.2 V | 7.93 V (1.91%) | 2498.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.71 V (0.89%) | 411.3 V | 6.11 V (1.47%) | 1926.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.97 V (0.71%) | 412.0 V | 4.89 V (1.18%) | 1540.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.22 V (0.54%) | 412.8 V | 3.67 V (0.88%) | 1155.6 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 300A at 80 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 300A over 80m at 415V (voltage drop: 5.93V or 1.43%).
What is the power capacity of 300A at 415V?
At unity power factor, 300A at 415V supports 215.64 kW with a standard 300A circuit breaker.
Related Lengths & Currents (415V)
300A · 5m (415V)300A · 10m (415V)300A · 15m (415V)300A · 20m (415V)300A · 25m (415V)300A · 30m (415V)300A · 35m (415V)300A · 40m (415V)300A · 45m (415V)300A · 50m (415V)300A · 60m (415V)300A · 70m (415V)10A · 80m (415V)16A · 80m (415V)20A · 80m (415V)25A · 80m (415V)32A · 80m (415V)40A · 80m (415V)50A · 80m (415V)63A · 80m (415V)80A · 80m (415V)100A · 80m (415V)125A · 80m (415V)160A · 80m (415V)200A · 80m (415V)